Valve suffers massive 12TB leak, revealing a decade of Steam game files

Valve has reportedly suffered a massive leak, with over 12 terabytes of the game developer's internal data now available online.

This not only includes data from its own games such as Portal 2 and the cancelled Half-Life 2: Episode 3 , but also other developers' games such as Grand Theft Auto V and Dragon Age: Origins .

It could be one of the largest video game leaks ever.

SEE ALSO: GTA 6 Cyberleek update: Everything leaked so far, what might be coming next The Steam2 Content Server Dump first came to light on Saturday, and quickly spread on social media.

Steam2 was Valve's previous content distribution system, which was phased out after the introduction of SteamPipe in 2013.

Valve used Steam2 to deliver game updates through its digital storefront Steam, which was launched in 2003.

This leak purportedly contains data from a Steam2 content server, and spans the decade between 2003 to 2013.

It's unclear exactly who is responsible for the leak.

However, Valve content creator Scolcer claimed that the data wasn't hacked, but found publicly available on an unprotected website (via Google Translate).

This was corroborated by another Valve-focused content creator Gabe Follower .

"No hacking involved, just verified that everything in Steam2 Teraleak was obtained via a publicly accessable [sic] endpoint.

It's Valve's fault…" Gabe Follower posted to X.

"That's why it's only before 2013, after that they switched to the new storage system." Play our Big Guessing Game: Make your predictions now for a chance to win a new Apple Watch .

Time's running out! While fans are still combing through the massive archive of data, they've already uncovered a lot of interesting information.